Improved lifting-jack



UNITED STATES PATENT OEFICE.

S. J. PARMELE, 0F KILLINGWORTH, CONNECTICUT.

IMPROVED LlFTING-JACK.

Specification forming part of Letters Patent No. 51,963, dated J annary9, 1866.

To all whom 'it may concern:

Be it known that I, S. J. PARMELE, of Killingworth, in the county ofMiddlesex and State of Connecticut, have invented a new and ImprovedLifting-Jack; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable others skilledin the art to make and use the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure lis a side elevation of my liftingjack, partly in section. Fig. 2is a front view ot' the same.

Similar letters of reference indicate like parts.

My invention consists in the use, in connection with the lifting-bar andlocking-bar of a carriage-jack, of a slide of peculiar construction,whereby the adjustment or locking of the lifting-bar is greatlyfacilitated; and it also consists in a novel arrangement, iu combinationwith the other parts of the jack, of

the catch-lever or pawl for holding the rackbar at the desired height,as will be presently described.

To enable others to understand my invention, I will proceed to describeit.

A represents the rack-bar of the jack. It is arranged to slide upanddown in a case or guiding-frame, B, in the usual or any snit-ablemanner.

C is a pawl or catch-lever, which is pivoted to the case B at the bottomof a vertical slot. (See Fig. 2.) This catch-lever has a bent end, b,which, when the.rackbar is to be raised, catches into holes c madetherein along its length for the purpose of regulating the height orsetting the jack,77 as it is called, and this catcl1-lever carries onits lower end a footpad, d, on which the foot can be placed when it isdesired to withdraw the end b of the catch-lever from the holes in therack-har to allow the rack-bar to be raised, and a spring, e, isarranged under the end of the catch-lever, for keeping the end b alwayspressed against the rack-bar, so as to catch into one of the holestherein so soon as the foot is removed.

D is the lifting-lever, which is secured to the rack-bar in the usualway or any suitable way. This lifting-lever has notches f f cut into'itsupper edges for a suitable distance, which are intended for receiving arod, g, extending across the locking-bar E at its upper end. Thislocking-bar, in the present instance,

consists of two arms pivoted to the case B, as shown in Fig. 2, andseparated sufficiently to allow of the lifting-lever passing between thetwo arms. A slide, F, is used in connection with this lockin g-bar. Itsshape is shown clearly in Fig. 3. It rides on the top of thelocking-bar, its lian ges or lips extending down each side, and a slotis cut in them of such form that one part shall be deeper than theother.

When itis not desired to have the rod g catch into the notches the saidrod rides on the part t' of the slide, and is thus enabled to slide overthe notches to the one where it is intended that it shall rest, when, bya slight elevation or depression ofthe liftinglever, the rod will dropoff into the part j and will immediately catch into the desired notch.Again, when it is desired to release the lifting-lever to lower thecarriage-axle, a slight depression of the lifting-lever will throw therod g upon the part i' of the slide, when it will be again caused toslide over the notches in the lifting-lever.

The operation of this jack is very simple, and it requires but verylittle manipulation to adjust it for use.

To use thejack the foot is placed upon the foot-pad d, which releasesthe rack-bar. The rack is then raised by raising upward thelifting-lever until the shorter end of the liftinglever, when fullydepressed, just reaches the axle of the carriage. The foot is thenremoved and the rack-bar locked in such position.v

Now, by depressing the handle of the lever the wheel will be raised,and, the rod g catching in the proper notch on the lifting-lever, theaxle will bc held firmly at the desired height.

By this invention I provide a Very simple and strong lifting-jack, andone which can be easily and quickly adapted for use and as quicklywithdrawn from the carriage-axle.

Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The slide F, in combination with the lifting-lever D and locking-barE, substantially as and for the purpose specified.

2. The combination of the catch-bar C and spring e with the rack-bar Aand lifting-1ever D and locking-bar E, substantially as shown anddescribed.

S. J. PARMELE.

Witnesses:

NORMAN L. PARMELE, NEWEL C. DAVIS.

